Finding the Fourth Proportional to 1,570.64, 2,166.86 and 907.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.64 : 2,166.86 = 907.37 : x
2. Step 2: Convert to fraction form
   1,570.64/2,166.86 = 907.37/x
3. Step 3: Cross multiply
   1,570.64x = 2,166.86 × 907.37
4. Step 4: Simplify right side
   1,570.64x = 1,966,128.39
5. Step 5: Solve for x
   x = 1,966,128.39/1,570.64
6. Step 6: Final answer
   x = 1,251.80